The slant bolster mint set of 2012 is a neato set. It included 7 knives with Dark Red peach seed jigged bone, scrolled bolsters, and a long tailed C serial number. It came in a wood and glass frame slanted to look like a slant bolster knife. Look closely at the frame bottom. Notice that it says “SLANT BOLSET MINT SET ONE OF 250”, and that is the error. The COA indicates that 150 were made. And this quantity has been confirmed by the Case factory–150 not 250.